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33 results about "Magnetic nanowire" patented technology
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Magnetic Data Storage Device and Method
InactiveUS20100124091A1High densityNanoinformaticsSemiconductor/solid-state device manufacturingNanowire arrayMolecular physics
A data storage device comprises an array of parallel magnetic nanowires each having a uniaxial anisotropy with an easy axis substantially perpendicular to the longitudinal axis of the nanowire and which is rotated about the longitudinal axis along the length of the nanowire, and a magnetisation state that follows the easy axis, where each nanowire has a data input element for nucleating magnetic domains separated by domain walls in an end of the nanowire, the sequence of domains and walls representing binary data, and a data read-out element operable to detect the magnetisation at an end of the nanowire, the device also comprising a magnetic field source operable to generate a magnetic field rotating in a plane substantially perpendicular to the longitudinal axes of the nanowires so as to propagate domain walls along the at least one nanowire. Reversal of the direction of rotation of the magnetic field reverses the propagation direction of the domain walls, so that data can be moved in either direction along the nanowires.
Owner:INGENIA HLDG LTD
Data Storage Device and Method
InactiveUS20080278998A1Improve scalabilityImprove storage densityNanotechSemiconductor/solid-state device manufacturingMass storageNanowire
A serial magnetic mass storage device and associated data storage method is provided based on magnetic nanowires that support single magnetic domains separated by domain walls. Each data-storing nanowire has a plurality of crossing nanowires along its length, forming cross junctions that constitute domain wall pinning sites. Data is fed through each data-storing nanowire by moving the magnetic domains under the action of a field that alternates between alignment and anti-alignment with the crossing nanowires. The data is encoded in the chirality of the domain walls, with up and down chirality transverse domain walls being used to encode 0's and 1's. Data is clocked into each nanowire with suitable nucleation generators capable of nucleating domains with domain walls of pre-defined chirality. Data is clocked out of each nanowire with suitable magnetic field sensors that sense the chirality.
Owner:INGENIA HLDG LTD
Compound magnetic nanowires for tco replacement
InactiveUS20100101832A1Good light transmissionImprove conductivityContact member manufacturingConductive layers on insulating-supportsOptical transparencyCarbon nanotube
This invention provides an optically transparent electrically conductive layer with a desirable combination of low electrical sheet resistance and good optical transparency. The conductive layer comprises a multiplicity of compound magnetic nanowires in a plane, the compound nanowires being aligned roughly (1) parallel to each other and (2) with the long axes of the compound nanowires in the plane of the layer, the compound nanowires further being configured to provide a plurality of continuous conductive pathways, and wherein the density of the multiplicity of compound magnetic nanowires allows for substantial optical transparency of the conductive layer. A compound magnetic nanowire may comprise a silver nanowire covered by a layer of magnetic metal such as nickel or cobalt. Furthermore, a compound magnetic nanowire may comprise a carbon nanotubes (CNT) attached to a magnetic metal nanowire. A method of forming the conductive layer on a substrate includes: depositing a multiplicity of compound magnetic conductive nanowires on the substrate and applying a magnetic field to form the compound nanowires into a plurality of conductive pathways parallel to the surface of the substrate.
Owner:APPLIED MATERIALS INC
Data storage device and method
InactiveUS7710769B2Improve scalabilityImprove storage densityNanotechSemiconductor/solid-state device manufacturingMass storageNanowire
A serial magnetic mass storage device and associated data storage method is provided based on magnetic nanowires that support single magnetic domains separated by domain walls. Each data-storing nanowire has a plurality of crossing nanowires along its length, forming cross junctions that constitute domain wall pinning sites. Data is fed through each data-storing nanowire by moving the magnetic domains under the action of a field that alternates between alignment and anti-alignment with the crossing nanowires. The data is encoded in the chirality of the domain walls, with up and down chirality transverse domain walls being used to encode 0's and 1's. Data is clocked into each nanowire with suitable nucleation generators capable of nucleating domains with domain walls of pre-defined chirality. Data is clocked out of each nanowire with suitable magnetic field sensors that sense the chirality.
Owner:INGENIA HLDG LTD
Preparation method of Sm-Co alloy amorphous magnetic nanowire array
The invention discloses a technical scheme of a preparation method of a Sm-Co alloy amorphous magnetic nanowire array, relates to amorphous alloy of which the main component is cobalt. The preparation method comprises the following steps: performing nanowire deposition in electrolytic deposition liquid which is prepared by using 100mL of de-ionized water and has a molar concentration ratio of SmCl3.6H2O to CoCl2.6H2O to H3BO3 to glycine to ascorbic acid being (0.5-1.8) to (2-5) to (5-10) to (4-8) to (3-7) in an electrolytic deposition tank of a special Sm-Co alloy amorphous magnetic nanowire deposition device, and annealing the deposited Sm-Co alloy amorphous magnetic nanowire array to prepare a Sm-Co alloy amorphous magnetic nanowire array product. According to the method, the defect of low deposition rate of Sm-Co alloy nanowires, namely the Sm-Co alloy amorphous magnetic nanowire array in the prior art is overcome.
Owner:HEBEI UNIV OF TECH
Magnetic random number generator
A magnetic random number generator is disclosed. The magnetic random number generator comprises: a) a Hall cross structure comprising at least one magnetic nanowire with perpendicular magnetic anisotropy; b) an in-plane pulsed current generator operable to generate stochastic nucleation of domain walls (DWs) in the Hall cross structure; and c) a sensor configured to measure a parameter of the Hall cross structure upon DW nucleation, wherein said parameter has a value representing a random number. A greater number of Hall cross structures may be employed to generate a random number having a greater number of bits.
Owner:NANYANG TECH UNIV
Magnetic nanostructures for tco replacement
InactiveCN102197439AConductive layers on insulating-supportsNanomagnetismOptical transparencyCarbon nanotube
This invention provides an optically transparent electrically conductive layer with a desirable combination of low electrical sheet resistance and good optical transparency. The conductive layer comprises a multiplicity of magnetic nanostructures in a plane, aligned into a plurality of roughly parallel continuous conductive pathways, wherein the density of the magnetic nanostructures allows for substantial optical transparency of the conductive layer. The magnetic nanostructures may be nanoparticles, nanowires or compound nanowires. A compound magnetic nanowire may comprise a silver nanowire covered by a layer of magnetic metal such as nickel or cobalt. Furthermore, a compound magnetic nanowire may comprise a carbon nanotube (CNT) attached to a magnetic metal nanowire. A method of forming the conductive layer on a substrate includes: depositing a multiplicity of magnetic nanostructures on the substrate and applying a magnetic field to form the nanostructures into a plurality of conductive pathways parallel to the surface of the substrate.
Owner:APPLIED MATERIALS INC
Method of operating information storage device using magnetic domain wall movement
ActiveUS20090310241A1Reducing driving energyWeaken energyRecord information storageRecording/reproducing/erasing methodsNanowireMolecular physics
A method of operating an information storage device using a magnetic domain wall movement in a magnetic nanowire is provided. The magnetic nanowire includes a plurality of magnetic domains and pinning sites formed in regions between the magnetic domains. The method includes depinning the magnetic domain wall from a first pinning site by applying a first pulse current having a first pulse current density to the magnetic nanowire and moving the magnetic domain wall to a second pinning site by applying a second pulse current having a second pulse current density to the magnetic nanowire. The first pulse current density is greater than the second pulse current density.
Owner:SAMSUNG ELECTRONICS CO LTD
Production method of graphene foam/magnetic nanowire composite wave-absorbing material
ActiveCN110272719ASimple structureReduce energy consumptionOther chemical processesPorous grapheneElectromagnetic coupling
The invention relates to a production method of a graphene foam / magnetic nanowire composite wave-absorbing material. The production method of the graphene foam / magnetic nanowire composite wave-absorbing material comprises the following steps of producing a graphene oxide aqueous solution, conducting high-speed centrifugation for multiple times by using ethyl alcohol as a solvent to make sure that water is completed replaced, so as to obtain a graphene oxide solution with the low-concentration ethyl alcohol used as the solvent, carrying out a one-step hydrothermal reaction to produce three-dimensional porous graphene oxide foam, and then carrying out a secondary hydrothermal reaction to synthesize one-dimensional magnetic nanowires in a porous structure formed by two-dimensional graphene sheet layers, so as to form a rich structure which integrates multidimensional scaling. Electrical loss and magnetic loss of the graphene foam / magnetic nanowire composite wave-absorbing material are given play to, and an electromagnetic coupling effect, an interfacial effect, a nanometer effect and a quantum effect are used at the same time, so that excellent wave absorbing performance is obtained, wide-frequency high-strength absorption of electromagnetic waves is achieved, and the problems of electromagnetic interference, electromagnetic radiation and the like can be effectively solved.
Owner:TONGJI UNIV
Magnetic atomic force microscope probe adopting magnetic nanowires
InactiveCN107782918ASolve bottlenecksIncrease horizontal resolutionScanning probe microscopyAtomic force microscopyNanowire
The invention discloses a magnetic atomic force microscope probe adopting magnetic nanowires and a manufacturing method thereof, so as to solve the bottleneck problem of the current magnetic atomic force microscope probe and greatly improve the service life and the resolution of the atomic force microscope probe. The magnetic nanowire probe can be manufactured by adopting a direct bonding method and a chemical vapor deposition growth method. The ultra-high resolution and the ultra long service life of the magnetic one-dimensional nano material probe are made full use of to solve the problems of short service life, easy wear and the like for a long time of the magnetic atomic force microscope probe test, the test consistency is improved, and needs of different application fields such as scientific research, production and teaching can be met.
Owner:苏州泰岩新材料有限公司
Method of operating information storage device using magnetic domain wall movement
ActiveUS8270197B2Weaken energyReduce total powerRecord information storageRecording/reproducing/erasing methodsNanowireMolecular physics
A method of operating an information storage device using a magnetic domain wall movement in a magnetic nanowire is provided. The magnetic nanowire includes a plurality of magnetic domains and pinning sites formed in regions between the magnetic domains. The method includes depinning the magnetic domain wall from a first pinning site by applying a first pulse current having a first pulse current density to the magnetic nanowire and moving the magnetic domain wall to a second pinning site by applying a second pulse current having a second pulse current density to the magnetic nanowire. The first pulse current density is greater than the second pulse current density.
Owner:SAMSUNG ELECTRONICS CO LTD
Magnetoresistance effect element and magnetic memory device
ActiveUS20180108390A1Unstable operationReduce adverse effectsNanomagnetismMagnetic measurementsIn planeNanowire
A magnetoresistance effect element includes a recording layer containing a ferromagnetic body, and including a first fixed and second magnetization regions having magnetization components fixed substantially in a direction antiparallel to the in-plane direction to each other, and a free magnetization region disposed between the first and second fixed magnetization regions and having a magnetization component invertible in the in-plane direction, a domain wall disposed between the first fixed magnetization region and the free magnetization region, and being movable within the free magnetization region, and a magnetic nanowire having a width of 40 nm or less. The thickness of the recording layer is 40 nm or less and at least half but no more than twofold the width of the magnetic nanowire. The element further includes a barrier layer disposed on the recording layer, and a reference layer disposed on the barrier layer and containing a ferromagnetic body.
Owner:TOHOKU UNIV
Magnetic nanowire array thin film and preparation method thereof
InactiveCN103276360APromote growthAvoid disadvantagesVacuum evaporation coatingSputtering coatingMicrowaveNanowire
The invention discloses a magnetic nanowire array thin film and a preparation method thereof, and belongs to the technical field of electronic function materials. The magnetic nanowire array thin film comprises an MgAl2O4 monocrystal substrate, a Pb (Zr 0.52 Ti 0.48) O3 matrix and Ni Fe 2O4 nanowires, wherein the Ni Fe 2O4 nanowires are uniformly distributed in the Pb (Zr 0.52 Ti 0.48) O3 matrix to form the magnetic nanowire array thin film deposited on the MgAl2O4 monocrystal substrate (001) orientation surface. The thin film adopts the PZT-NFO target and (001) orientated MgAl2O4 monocrystal substrate, and is prepared by a 90-degree off-axis magnetron sputtering technology, so that the thin film has the characteristics of small ferromagnetic resonance line width and lattice mismatch, high ferromagnetic resonance frequency and capability of self-assembled epitaxial growth, and is an important material used for a microwave nonreciprocity device; and the preparation method is easy to implement, parameters are convenient to control, the structure is simple, and the cost is low.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Preparation method of Tb-Dy-Fe-Co alloy magnetic nano pipe array
ActiveCN108914174AOutstanding FeaturesHighlight significant progressVacuum evaporation coatingSputtering coatingElectrolysisNanowire
The invention discloses a preparation method of a Tb-Dy-Fe-Co alloy magnetic nano pipe array and relates to a uniform polycrystalline material of a certain structure. According to the method for preparing the Tb-Dy-Fe-Co alloy magnetic nano pipe array by means of an electrochemical deposition method in a water solution, the rare earth-transition metal nano pipe array is prepared by regulating theconcentrations of Tb and Dy ions. The method comprises the steps that an AAO template is subjected to metal spraying treatment; a Tb-Dy-Fe-Co alloy electrolytic deposition solution is prepared; and inan electrolytic deposition tank, electrification is performed, the direct-current voltage is 2V-3V, the deposition current is 10mA-20mA, meanwhile, a magnetic stirrer is used for stirring the solution, electrification is performed for 1h-3h, and then the good magneto-optic material Tb-Dy-Fe-Co alloy magnetic nano pipe array is prepared. The defect that a magnetic nanowire array prepared in the prior art is not applicable to being used as a magneto-optic storage material is overcome.
Owner:HEBEI UNIV OF TECH
Magnetic electret fiber air purifying and filtering material and preparation method
InactiveCN109316831AGood effectInitial potential increaseDispersed particle filtrationFiltration separationParticulatesNickel salt
The invention relates to the field of air purification, and discloses a magnetic electret fiber air purifying and filtering material and a preparation method. The preparation method comprises the following preparation processes: (1) preparing metal ion solutions of ferric salt, cobalt salt and nickel salt; (2) adding into a mixed solution of cyclohexane, n-amyl alcohol, cetyl trimethyl ammonium bromide and oxalic acid to form a microemulsion, and calcining to prepare magnetic nanowire powder; (3) adding the magnetic nanowire powder, inorganic electret nanoparticle titanium dioxide, silicon dioxide and a polar polymer into a solvent to prepare electrostatic spinning fluid; and (4) performing electrostatic spinning on a non-woven fabric to prepare the magnetic electret fiber air purifying and filtering material. The magnetic nanowire added in the prepared magnetic electret fiber material not only enhances the initial potential but also slows down the attenuation of surface potentials, amagnetic field enables the material to keep surface potential for a long time in damp air, the magnetic field decay is extremely slow, the capture capacity of the material to particulate matters is enhanced, and the service life of the material is prolonged.
Owner:CHENDU NEW KELI CHEM SCI CO LTD
Preparation method for magnetic nanowire
InactiveCN109574087AAvoid wastingNo special temperature requirementMaterial nanotechnologyFerroso-ferric oxidesNanowireSpinel
A preparation method for a magnetic nanowire is disclosed. The preparation method includes the following steps: step 1. preparing a metal ion solution, an alkali solution and a water-soluble reducingagent solution; step 2. mixing the metal ion solution, the alkali solution and the water-soluble reducing agent solution, charging a reaction kettle, and reacting in a magnetic field heat treatment furnace; and step 3. obtaining the magnetic nanowire by washing and drying. The preparation method solves the problems that preparation methods of existing Fe3O4 nanowires and spinel type ferrite nanowires are complicated in operation, are high in cost and are low in nanowire yield. The preparation method is simple in operation, does not pollute environment, and is low in cost, and the yield of theprepared magnetic nanowire is 95.6-99.9%. The preparation method is applied in the field of magnetic materials.
Owner:鄄城永铭地毯有限公司
Magnetic nanowire device, manufacturing method thereof and magnetic nanowire construction method
The invention provides a magnetic nanowire device, a manufacturing method thereof and a magnetic nanowire construction method. The magnetic nanowire device comprises a substrate, a first electrode layer, an insulating layer, an atomic barrier layer and a second electrode layer sequentially arranged in a stacked mode, wherein one of the first electrode layer and the second electrode layer serves as a ferromagnetic electrode layer, and the other is a non-magentic electrode layer. The magnetic nanowire device also comprises the atomic barrier layer arranged between the ferromagnetic electrode layer and the insulating layer; and the atomic barrier layer comprises a nano through hole. The magnetic nanowire device can effectively and accurately control the width and the position of a magnetic nanowire, and confinement and stabilization of the nanowire can be realized. The magnetic nanowire device realizes magnetoelectric coupling effects, and a carrier is provided for studying a new multilevel memory device.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI
Data storage device and method
A serial magnetic mass storage device and associated data storage method is provided based on magnetic nanowires that support single magnetic domains separated by domain walls. Each data-storing nanowire has a plurality of crossing nanowires along its length, forming cross junctions that constitute domain wall pinning sites. Data is fed through each data-storing nanowire by moving the magnetic domains under the action of a field that alternates between alignment and anti-alignment with the crossing nanowires. The data is encoded in the chirality of the domain walls, with up and down chiralitytransverse domain walls being used to encode 0's and 1's. Data is clocked into each nanowire with suitable nucleation generators capable of nucleating domains with domain walls of pre-defined chirality. Data is clocked out of each nanowire with suitable magnetic field sensors that sense the chirality.
Owner:INGENIAHLDG UK LTD
A substrate with magnetic nanowires being arranged on the surface and a preparation method of the substrate
InactiveCN104183630AArrangement controllableAchieve preparationMaterial nanotechnologyNanoinformaticsNanowireNanometre
The invention relates to a substrate with magnetic nanowires being arranged on the surface and a preparation method of the substrate. The surface of the substrate is provided with the orderly-arranged magnetic nanowires. The preparation method of the substrate comprises the steps of dispersing the magnetic nanowires into a dispersing solution, and then, using a magnetic field to enable the magnetic nanowires to be orderly-arranged and deposited on the surface of the substrate. By utilizing the magnetic properties of the magnetic nanowire material itself and under the action of a magnetic field, directional arrangement can be realized, and large-area, multiple-angle, multiple-mode, multiple-layer controllable nano material arrangement can be realized; the operation is simple; and the large-area preparation and arrangement of the materials help to promote the development of large-scale and integrated production of semiconductor devices.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Magnetic random number generator
A magnetic random number generator is disclosed. The magnetic random number generator comprises: a) a Hall cross structure comprising at least one magnetic nanowire with perpendicular magnetic anisotropy; b) an in-plane pulsed current generator operable to generate stochastic nucleation of domain walls (DWs) in the Hall cross structure; and c) a sensor configured to measure a parameter of the Hall cross structure upon DW nucleation, wherein said parameter has a value representing a random number. A greater number of Hall cross structures may be employed to generate a random number having a greater number of bits.
Owner:NANYANG TECH UNIV
Fluid viscosity detection device and detection method based on nanowire vertical array
The invention discloses a fluid viscosity detection device and detection method based on a nanowire vertical array. The detection device includes a human-computer interaction device, a detection processing circuit, a detection probe including an excitation coil, and a microchip made of a magnetic nanowire array. , the detection probe is connected with the detection processing circuit and the human-computer interaction device in turn, the microchip is used to put into the fluid to be tested, and the detection probe is used to provide an alternating magnetic field for the microchip directly above the fluid to be tested and detect the microchip’s real-time vibration signal. The invention is compact in structure, small in size, easy to move, only needs a small amount of samples to detect viscosity, has high stability and reliability, and adopts magnetic nanowire array, which greatly improves sensitivity and response speed, and does not need additional consideration of fluid conduction It can be widely used in the field of fluid viscosity measurement.
Owner:GUANGDONG UNIV OF TECH
Preparation method of Nd-Fe-B magnetic nanowire array
ActiveCN108660487AA large amountIncrease deposition rateSurface reaction electrolytic coatingNanotechnologyNeodymium chlorideIron(II) chloride
The invention discloses a preparation method of a Nd-Fe-B magnetic nanowire array. The preparation method comprises the following steps: neodymium chloride (NdCl3.6H2O), ferrous chloride (FeCl2.4H2O),boric acid (H3BO3) and de-ionized water are mixed to prepare NdFeB alloy solution; a complexing agent is added to obtain depositing liquid, wherein the complexing agent is glycine (NH2CH2COOH), ammonium chloride (NH4Cl) and ascorbic acid (C6H8O6); and graphite is used as an anode, an AAO template is used as a cathode, the Nd-Fe-B depositing liquid prepared in the last step is electrolyte, and a direct-current voltage-stabilization power supply is used for electrochemical deposition to finally obtain Nd-Fe-B ternary alloy magnetic nanowires. The obtained nanowires are high in number and deposition rate, arranged in parallel, ordered in height, uniform in diameter and higher in length-diameter ratio.
Owner:HEBEI UNIV OF TECH
A multiphase composite magnetic nanowire array and its preparation method
The present invention relates to a multi-phase composite magnetic nano-wire array and a preparation method thereof. According to the preparation method, an electric conduction glue for an AAO template with a gold-sprayed back surface and a Cu sheet are adhered to form a composite cathode, graphite with a smooth and clean surface is adopted as an anode, electrochemical deposition is alternately performed in a Fe-Co electroplating solution and a Sm-Co electroplating solution after the cathode and the anode are connected to a power supply so as to form nano-wires on the template, and the nano-wires in the template are subjected to annealing crystallization so as to obtain the multi-phase composite magnetic nano-wire array . Compared with the multi-phase composite magnetic nano-wire array in the prior art, the multi-phase composite magnetic nano-wire array prepared by the method of the present invention has characteristics of high length-diameter ratio, large coercive force and excellent magnetic anisotropy, can be used for high-density perpendicular magnetic recording medium, and is further a sensor element and electromagnetic device material having wide prospects.
Owner:TONGJI UNIV
Magnetic logic device
ActiveUS11362661B2Low write in-plane currentEasy to operateLogic circuits characterised by logic functionSubstrate/intermediate layersNanowireSoftware engineering
Disclosed is a magnetic logic device including: a plurality of input branches configured by a magnetic nanowire including a non-magnetic metallic layer, a free layer, and an insulating layer sequentially stacked; an output branch configured by the magnetic nanowire; a coupling portion configured by the magnetic nanowire and where the input branches and the output branch meet; gate electrodes arranged adjacent to the insulating layer in each of the plurality of input branches; and in-plane anisotropic ferromagnetic layers arranged adjacent to the non-magnetic metallic layer in each of the plurality of input branches.
Owner:KOREA ADVANCED INST OF SCI & TECH
Magnetic Logic Device
ActiveUS20210351776A1Quick switch operationLow write in-plane currentLogic circuits characterised by logic functionSubstrate/intermediate layersNanowireSoftware engineering
Disclosed is a magnetic logic device including: a plurality of input branches configured by a magnetic nanowire including a non-magnetic metallic layer, a free layer, and an insulating layer sequentially stacked; an output branch configured by the magnetic nanowire; a coupling portion configured by the magnetic nanowire and where the input branches and the output branch meet; gate electrodes arranged adjacent to the insulating layer in each of the plurality of input branches; and in-plane anisotropic ferromagnetic layers arranged adjacent to the non-magnetic metallic layer in each of the plurality of input branches.
Owner:KOREA ADVANCED INST OF SCI & TECH
Graphene-magnetic nanowire probe and preparation method thereof
ActiveCN111661841BSpeed up extractionImprove enrichment effectIon-exchange process apparatusIon-exchanger regenerationSputteringGraphite
The present invention relates to a kind of graphene-Fe 3 o 4 A solid-phase microextraction probe, the substrate of which is a metal wire, is characterized in that Fe is sequentially deposited on the surface of the metal wire 3 o 4 Nanowire arrays and graphene nanocrystals. Fe 3 o 4 Nanowire arrays were prepared by template-hydrothermal method; graphene nanocrystals were deposited by electron cyclotron plasma sputtering. The graphene two-dimensional nanomaterial is fully utilized, which has a large specific surface area, so that the probe has a good extraction and enrichment effect, and the probe has high sensitivity and good stability. Through the template-hydrothermal method, the porous structure of anodized aluminum is pre-obtained on the surface of the metal wire to realize Fe 3 o 4 The controllable growth of the nanowire array ensures the subsequent deposition of graphene nanocrystals. direct magnetic Fe 3 o 4 The nanowire array is deposited between the metal wire and the graphene nanocrystal, and the probe can optimize the extraction effect by applying an external magnetic field during the process of processing the sample, and the method is simple.
Owner:丁道其
Magnetic hole substrate for preparing flaky electromagnetic noise suppression material
InactiveCN105112982AImprove conductivitySimple manufacturing processAnodisationMagnetic/electric field screeningNanowireArgon atmosphere
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Low insertion loss self-biased microstrip circulator based on magnetic nanowire array
InactiveCN105304992BLow dielectric constantLow insertion lossWaveguide type devicesNanowire arrayNanometre
A low insertion loss self-biased microstrip circulator based on a magnetic nanowire array belongs to the field of microwave passive devices. The invention includes a microstrip Y-junction matching line, a hexagonal dielectric layer with a cylindrical through hole in the center, a metal bottom electrode and The cylindrical central junction is characterized in that the cylindrical central junction includes a top insulating layer and a bottom insulating layer, and at least two nanowire array layers between the top insulating layer and the bottom insulating layer, and between adjacent nanoarray layers Between is the air layer. The center junction of the circulator of the present invention adopts three layers of magnetic nanowire array layers deposited with porous alumina templates, and the layers are separated by an air layer, so as to achieve the purpose of reducing the overall dielectric constant of the center junction, which has the characteristics of X-band in the microwave frequency band Low insertion loss and high isolation.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Method for Improving Pressure Capability of Magnetic Fluid Sealing by Using Magnetic Nanowire Magnetic Fluid
The invention provides a method for increasing the sealing and pressure resisting capacity of magnetic liquid by using magnetoconductivity nanowire magnetic liquid, belongs to the technical field of mechanical engineering sealing and is particularly suitable for the sealing of the magnetic liquid. The magnetoconductivity nanowire magnetic liquid is formed by adding nanowires of which the lateral dimension is 10-100 nm and the length is 100-300 mum in existing magnetic liquid, then adding appropriate surface active agent and stirring the mixture for 40-50 minutes. The magnetoconductivity nanowire magnetic liquid is injected in a sealing gap sealed by the magnetic liquid. The existing magnetic liquid comprises fluorocarbon-based magnetic liquid, ester-based magnetic liquid and the like. According to the method provided by the invention, the problem that the sealing and pressure resisting capacity of the existing magnetic liquid is lower is solved.
Owner:BEIJING JIAOTONG UNIV
Rapid deposition method for periodic ordered magnetic nanowire array
ActiveCN109132996ADensity controllableFast depositionDecorative surface effectsCoupling light guidesNanometreMagnetic nanowire
The invention relates to a rapid deposition method for a periodic ordered magnetic nanowire array. The rapid deposition method uses a Halbach array magnet to induce the rapid deposition of an orderedmagnetic nanowire array on the surface of a substrate. The preparation method comprises the steps of dispersing magnetic nanowires in a solvent, closely attaching the surface of the substrate to a magnetic surface of the Halbach array magnet, adding a certain amount of magnetic nanowire solution to be in contact with the other side of the substrate to rapidly deposit and directionally arranging the magnetic nanowire array on the surface of the substrate, recovering the solvent, preparing a substrate having a periodic magnetic nanowire array on the surface, and the like. Magnetic nanowires areseparated from the solvent and directionally arranged by means of strong magnetic field attraction of the Halbach array, so that the rapid assembly of the magnetic nano-array and recycling of the solvent are realized, the environmental pollution is reduced, and the development of optoelectronic devices and the information engineering is promoted.
Owner:LIAOCHENG UNIV
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